Blowing Smoke

[WHITENOTCH5.0]

For some reason my car has started burning oil and smoking a good bit. It smoke at idle and under hard acceleration. Checked the plugs the other day when i did the headers and one spark plug on the drivers side was full of oil. What could this be...... Any help is appreciated........My car is a 1991 notch with about 80k on it. Bought the car about 2 months ago and it didnt smoke a bit.

 

[87'GTstang]

At idle, it's normally valve seals. On startup, it is valve seals. At high rpm's, it's mostly piston rings but can be partly blamed on valve seals if they are bad enough.

So, how much smoke is it at startup? How much smoke when the upper rpm range is reached?

 

[WHITENOTCH5.0]

a little bit of smoke on start up, then alot of smoke on accelleration and when it comes down to idle again it seems to smoke a good bit. are there any ways i can pin piont what is causing it to smoke.

 

[87'GTstang]

When it does come back down to idle, does it continue to smoke worse than it did at idle, or does it taper off and equate to as bad as idle is?

Are you positive it has JUST 80k miles and not 180k?

By acceleration, do you mean as the rpms increase, in the upper rpms, or under load so to speak?

 

[WHITENOTCH5.0]

when it comes back to idle it seems to go away for a little bit and then it starts to smoke again.i did a carfax on the car and it shows it at 80k. it smokes while im acclerating and under load if that makes sense.

 

[WHITENOTCH5.0]

this might also make a difference. I just changed my intake to a cobra intake. Could there be a problem with this. It started like 2-3 days after intake was done.

 

[87'GTstang]

Yes it would. When you put the lower intake on, did you remember to replace the gasket, did you torque ALL of the bolts to spec, and did you put all of the bolts in place? Oil from the oil passages can seap right into the intake runners and dump it into your combustion chambers.....

 

[AmMscl]

Number 8 spark plug??? (last one closest to windshield)
What do you mean by oil on headers? Maybe valve cover leaking or intake????
You could always do a compression test.....to check the differences of each cylinder.

 

[WHITENOTCH5.0]

Yes it would. When you put the lower intake on, did you remember to replace the gasket, did you torque ALL of the bolts to spec, and did you put all of the bolts in place? Oil from the oil passages can seap right into the intake runners and dump it into your combustion chambers.....

i put all new gaskets with sealer, put all the bolts back in and tightened it according to the chart i found on line. The only thing is i dont have a tourque wrench so they might not be tight enough. .......the spark plug that was wet was on drivers side second from back. and it didnt leak on the header, i noticed it when i put the headers on.

 

[AmMscl]

i put all new gaskets with sealer, put all the bolts back in and tightened it according to the chart i found on line. The only thing is i dont have a tourque wrench so they might not be tight enough. .......the spark plug that was wet was on drivers side second from back. and it didnt leak on the header, i noticed it when i put the headers on.

#7 .....You need to torque to spec (like 24ftlbs) and than re- evaluate

 

[WHITENOTCH5.0]

is there any test i can do to see if the oil is leaking into the runners or should i just pull the upper intake off and tighten the manifold down.

 

[Grn92LX]

Do you have the oil shield under the lower intake that goes under where the pcv valve and mesh go?If not you could be sucking in oil to the upper and its burning in the chambers. You also need to re torque your lower regardless to around 22 ft/lbs.